What 392.2-ML means in plain language
FMCSR 392.2-ML citations are issued when an inspector determines that a driver's ability to operate a commercial motor vehicle is impaired due to fatigue, illness, or another condition that affects alertness or control. This is not about a single mistake or a bad day—it's about a driver whose physical or mental state makes it unsafe to be behind the wheel.
The regulation recognizes that commercial driving requires sustained focus and quick reactions. When fatigue, illness, medication side effects, or any other condition degrades that capacity, the driver becomes a hazard to themselves, their cargo, and everyone sharing the road. An inspector might cite this violation if they observe signs like heavy eyelids, slurred speech, confusion, or erratic driving patterns that suggest impairment.
Importantly, this code does not result in an out-of-service order in nearly all cases. Across our inspection records, only 2 out of 948 citations (0.2% OOS rate) led to immediate removal from service. That means the citation itself is typically a warning—but a serious one that affects your CSA safety profile.
What our enforcement data actually shows
Our inspection records show 950 all-time citations for 392.2-ML, with 319 issued in the last 12 months and 58 in the last 90 days. This ranks the code at #729 out of 3,036 FMCSR codes by citation volume, placing it in the middle range of enforcement activity.
The out-of-service rate for 392.2-ML is 0.2%—significantly lower than the all-FMCSR average of 31.4%. This wide gap reflects the nature of the violation: most 392.2-ML citations are discretionary judgment calls by inspectors who observe signs of impairment but determine the driver can safely end the shift or get rest before continuing. Only in rare, severe cases does an inspector place a driver out of service immediately.
Monthly trends over the past 12 months show variability. Our data indicates a spike in May 2025 with 47 citations, followed by a gradual decline through the fall, then stabilization in winter and early spring. The last 90 days averaged about 19 citations per month.
Who gets cited most
Across the last 180 days, three states led in citation counts: Iowa with 46 citations and a 0.0% OOS rate, North Carolina with 33 citations and 0.0% OOS, and New Mexico with 29 citations and 0.0% OOS. Illinois had 20 citations with 1 out-of-service case (5.0% OOS rate), the only notable exception to the pattern of no immediate removals.
Our data shows large carriers such as Federal Express Corporation received 6 citations for this code over all time, followed by New Prime Inc, Evans Delivery Company Inc, and J B Hunt Transport Inc, each with 5 citations. This distribution reflects exposure—larger fleets with more driver-hours on the road naturally accumulate more citations across all violation types. It does not indicate industry-wide fatigue problems at those carriers.
How severe is this compared to similar codes
Code 392.2-ML belongs to a broader family of operating-while-impaired violations, all within the Unsafe Driving category. Our database shows the parent code 392.2 (Operating a CMV while ill or fatigued, generic) has received 1,208,164 citations with a 0.8% OOS rate—far higher volume but only slightly higher out-of-service frequency. Code 392.2RG (Operating a CMV while ill or fatigued, state-specific variant) shows 96,652 citations with a 0.1% OOS rate, comparable to 392.2-ML in enforcement severity.
The contrast with 392.2-SLLEQP (Operating a CMV while ill or fatigued, another variant) is instructive: that code has generated 72,352 citations but a 2.4% OOS rate, roughly 12 times higher than 392.2-ML. This suggests that certain jurisdictions or inspection scenarios flag fatigue violations as more immediately dangerous, warranting removal from service.
How to avoid it
Our inspection records reveal patterns in co-occurring violations that point to concrete prevention steps:
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Get adequate rest before every shift. The regulation targets drivers whose fatigue is evident to inspectors. A full night's sleep before starting your day eliminates the most common source of this citation. If you feel drowsy during pre-trip inspection, do not depart—rest first.
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Address illness before operating. If you are medicated, have a fever, are recovering from a virus, or are dealing with a condition that affects alertness, inform your dispatcher and secure a rest day. Common co-occurrences with 395.8E (False record of duty status) and 395.24C2III (Driver failed to manually add shipping document number) suggest that fatigued or impaired drivers sometimes falsify logs to mask rest breaks. Honest reporting keeps you safe and legal.
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Conduct a thorough pre-trip on your vehicle. Our data shows Freightliner (333 citations), Utility trailers (153), and Volvo (123) vehicles were most frequently cited for 392.2-ML. While the vehicle make itself is not the cause, mechanical issues—vibration, noise, uncomfortable cab temperature—can accelerate fatigue. Check your mirrors, lights, brakes, and seat position during pre-trip. A faulty seat or poor ergonomics compounds fatigue over long hours.
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Use your ELD correctly and keep accurate duty logs. Co-occurring violations like 395.22G (Portable ELD not mounted in a fixed position) and 395.8E suggest that some 392.2-ML drivers have poor logging discipline. An accurate log prevents overdriving and gives you a clear record of when you rested. Use your device as intended and place it visibly.
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Know your triggers and communicate early. If you are on medications that cause drowsiness, work a schedule that avoids your lowest-energy hours. If allergy season, seasonal illness, or a known condition affects you, tell your carrier in advance so they can adjust your assignment. The co-occurrence of 392.82A1 (Texting while driving) with 392.2-ML in 3 recent inspections suggests distracted drivers are also fatigued drivers—turn off notifications and focus on the road, not your phone.
The goal is simple: arrive at the roadside inspection with clear eyes, steady focus, and the documentation to prove you followed hours-of-service rules. Inspectors are trained to detect impairment, and their discretion is broad. Preventing this citation means managing your fatigue and health before an inspector has to make that judgment call.